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CryptoKey: algorithm property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2016.
The read-only algorithm property of the CryptoKey interface returns an object describing the algorithm for which this key can be used, and any associated extra parameters.
The object returned depends on the algorithm used to generate the key.
An object matching:
For RsaHashedKeyGenParams and HmacKeyGenParams, the hash property is always in the object form (with a property called name), not the string form.
js
const rawKey = window.crypto.getRandomValues(new Uint8Array(16));
// Import an AES secret key from an ArrayBuffer containing the raw bytes.
// Takes an ArrayBuffer string containing the bytes, and returns a Promise
// that will resolve to a CryptoKey representing the secret key.
function importSecretKey(rawKey) {
return window.crypto.subtle.importKey("raw", rawKey, "AES-GCM", true, [
"encrypt",
"decrypt",
]);
}
importSecretKey(rawKey).then((key) =>
console.log(
`This key is to be used with the ${key.algorithm.name} algorithm.`,
),
);